import java.util.List;
import org.hibernate.Query;
import org.hibernate.SQLQuery;
import org.hibernate.Session;
import org.hibernate.Transaction;
import org.sf.entity.Student;
import org.sf.util.HibernateSessionFactory;
import org.sf.dao.IStudentDao;
/**
 *  學生資料庫操作實現類
 * @author  宋鋒
 * @date 2013-04-25
 */
public class StudentDaoImpl implements IStudentDao {
	/**
	 *  取得所有的學生資訊
	 * @return
	 */
	@SuppressWarnings("unchecked")
	public List<Student> getAllStudentList(){
		List<Student> list = null;
		Session session = HibernateSessionFactory.getSession();
		Query q = session.createQuery("from Student");
		list = q.list();
		session.close();
		return list;
	}
	/**
	 *  通過id 取得某個學生資訊
	 * @param id
	 * @return
	 */
	public Student getStuentById(int id){
		Student student = null;
		Session session = HibernateSessionFactory.getSession();
		Query q = session.createQuery("from Student where id=?");
		q.setInteger(0, id);
		student = (Student)q.uniqueResult();
		session.close();
		return student;
	}
	/**
	 *  通過學號和密碼取得學生資訊，用於登入
	 * @param stunumber
	 * @param stupwd
	 * @return
	 */
	public Student getStudentByStunumberAndStupwd(String stunumber, String stupwd){
		Student student = null;
		Session session = HibernateSessionFactory.getSession();
		Query q = session.createQuery("from Student where stunumber=? and stupwd=?");
		q.setString(0, stunumber);
		q.setString(1, stupwd);
		student = (Student)q.uniqueResult();
		session.close();
		return student;
	}
	
	/**
	 *  取得學生的總數資訊
	 * @return
	 */
	public int getStudentCount(){
		int count = 0;
		Session session = HibernateSessionFactory.getSession();
		Query q = session.createQuery("select count(s) from Student s");
		Number number = (Number)q.uniqueResult();
		count = number.intValue();
		session.close();
		return count;
	}
	/**
	 *  取得學生分頁資訊
	 * @param pageNum
	 * @param pageSize
	 * @return
	 */
	@SuppressWarnings("unchecked")
	public List<Student> getStudentPageList(int pageNum, int pageSize){
		List<Student> list = null;
		Session session = HibernateSessionFactory.getSession();
		Query q = session.createQuery("from Student");
		q.setFirstResult((pageNum-1)*pageSize);
		q.setMaxResults(pageSize);
		list = q.list();
		session.close();
		return list;
	}
	/**
	 *  通過 系院id 取得學生資訊
	 * @param depid
	 * @return
	 */
	@SuppressWarnings("unchecked")
	public List<Student> getStudentListByDepid(int depid){
		List<Student> list = null;
		Session session = HibernateSessionFactory.getSession();
		Query q= session.createQuery("from Student where department.id=?");
		q.setInteger(0, depid);
		list = q.list();
		session.close();
		return list;
	}
	/**
	 *  新增學生資訊
	 * @param student
	 * @return
	 */
	public Student addStudent(Student student){
		Session session = HibernateSessionFactory.getSession();
		Transaction tran = session.beginTransaction();
		session.save(student);
		tran.commit();
		session.close();
		return student;
	}
	/**
	 *  修改選定的學生資訊
	 * @param student
	 */
	public void editStudent(Student student){
		Session session = HibernateSessionFactory.getSession();
		Transaction tran = session.beginTransaction();
		Student stuEdit = (Student)session.load(Student.class, student.getId());
		stuEdit.setStunumber(student.getStunumber());
		stuEdit.setStuname(student.getStuname());
		stuEdit.setStupwd(student.getStupwd());
		stuEdit.setDepartment(student.getDepartment());
		session.update(stuEdit);
		tran.commit();
		session.close();
	}
	/**
	 *  刪除學生資訊
	 * @param id
	 * @return
	 */
	public int delStudentById(int id){
		int i = 0;
		Session session = HibernateSessionFactory.getSession();
		Transaction tran = session.beginTransaction();
		SQLQuery sq= session.createSQLQuery("delete from student where id=:id");
		sq.setParameter("id", id);
		i = sq.executeUpdate();
		tran.commit();
		session.close();
		return i;
	}
}